Circular sawing machine



2- Sheets-Shet 1.

(No ModeL) R. E. KIDDER. CIRCULAR SAWING MACHINE.

No. 315,513. Patented Apr. '14, 1885.

2 Sheets- Sheet 2. R. E. KIDDER. CIRCULAR SAWING MACHINE.

(N0 ModeL) Patented Apr. 14, 1885.

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UNITED T STATES PATENT OFFICE.

RICHARD E. KIDDER, WORCESTER, MASSACHUSETTS.

CIRCULAR SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 315,513, dated April 14, 1885.

Application tiled- May 10, i884. (No model.)

To all whom it may concern.-

Be it known that I, RICHARD E. KIDDER, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Improvement in Saw-Benches, of which the following is a specification.

My invention relates to improvements in saw-benches in which two or more circular saws are used with their bearings arranged concentrically about an axis of rotation, so any one of the saws may be brought into action, as desired; and the objects of my invention are to provide means by which the spider carrying the several saw-arbors may be disconnected from the driving-power; the saws changed and securely locked in position, and

connecting the upper saw with the driving-' power while the remaining saws remain at rest; to provide facilities for adjusting the top of the saw-bench, so as to regulate the distance the saw in action shall project through the same; to obviate the noise caused by the engaging teeth of the clutch when the saw is in motion, and to provide adjustable gages and to provide an adjustable rest. These objects are attained by the .mechanism illustrated in the accompanying drawings, in which Figure l is a front elevation of the sawbench; Fig. 2, a front elevation with the front side removed; Fig. 3, a side elevation; Fig. 4, a detached view of one of the saw-arbors with the driving-clutch and a portion of the locking device; Fig. 5, a top view of a por-. tion of the device for changing the saws and locking the saw-arbor in position; Fig. 6, a view of the rear side of the locking-wheel on the shaft carrying the saw-arbors, and Fig. 7"

a portion of the driving'clutch.

Similar letters refer to similar parts in the several views.

A A denote the frame, consisting of a metallic case for retaining the sawdust, which may be removed by-means of adoor, A. The shaft 0, held in bearings attached to the sides of the case, carries the three-armed spidersB B, attached tothe shaft 0 with their arms 0 c,

' carrying at their outer ends bearings for the saw-arbors D, D, and D which are thus held concentric with the shaft 0 and equidistant therefrom, and also from each other. Upon one end of each of the said arbors may be placed a saw, a, a, and a, furnishing such a variety,

as the ordinary requirements of the workshop demand,and upon the opposite ends of the arbors are the toothed clutches b b If, adapted to engage the teeth of a similar sliding clutch, D, on the shaft E, which revolves in a suitable bearing in the frame of the machine, driven by the belt-pulley E. Sliding in the frame is a bar, d, its inner end actuating the pivoted fork F, by which the sliding clutch D is operated, and its outer end entering one of the three equidistant and concentric holes e e e in the wheel F, attached to the shaft 0, by which the shaft 0 and its saw-carrying spiders are prevented from turning, and held with one of the saw-arbors in axial line with the driving-shaft E. Aspiral spring, f, inclosed of the sliding clutch, acting directly. on the clutch. One of these springs is shown at d, Fig. 4. At the side of the locking-wheel F, and turning upon the end of the shaft 0, is a sector, G, which may be vibrated by the attendant by meansof the handle held in convenient position when not in use by the pin 9'. The vibrating sector carries the two pawls h h. The pawl h is beveled or wedgeshaped, and asit, passes the wedge-shaped block h attached to the sliding bar d, causes the bar 01 to slide, withdrawing the end from the wheel F and. unlocking. the shaft 0, and also through the pivoted fork .F sliding the clutch D out of contact with the clutchon the saw-arbor. The pawl h slides over the edge of the locking-wheel F, and upon the wheel Fare placedthe three equidistant teeth t i 1 so arranged in proper position that when the sector is vibrated by pulling upon the handle one of these teeth shall be engaged by the pawl h as soon as the simultaneous withdrawal of the bar d and the disconnecting of the driving-clutch are, accomplished and the wheel F and shaft 0 turned,carrying the upper saw over and'bringing the next saw and its arbor in axial line with the driving'shaft. The action of pawl h on the wedgeshaped block h holds the bar d from reentering the hole. in the wheel F until the pawl h has I from the frame (not shown) may be used to carried the wheel F far enough to bring the hole 6 past the end of the bar (I, when the pawl it releases the wedge h and the action of the springsf and d holds the outer end of the bar against the rim of the wheel F until the hole 6 has been brought into line with the bar d, which instantly enters the hole, thereby locking the shaft 0 in position, and the sliding clutch D at the same time engaging the clutch presented upon the saw arbor brought into line. By reversing the action of the sector G the pawls h h will slide, respectively, over the wedge -shaped block'h and the teeth upon the wheel F. Any suitably-arranged stopsuch as a pinprojecting hold the sector in the position shown in Fig. 3. At the rear end of the frame I hinge the top or table H so its front edge may be raised by means of the sliding rack j and geared sectorj, pivoted at j to the side of the frame, and provided with the handlej The rack j slides in a split bearing, K, upon the frame, having a binding-screw, K, and the projecting arms jsupportthe edge ofthe table,which may be held in any position desired by the bindingscrew K. Springs are inserted in chambers in the frame, acting against the under edge of the top, one of which is shown at Z, Fig. 3, of sufficient tension to counterbalance in part the weight of the top.

In Fig. 7 is shown a portion of the drivingclutch, in which I insert a spring, m, between each one of the teeth of the clutch, the free end of the spring extending out part thelength of the tooth, and slightly bent, so as to stand out from the tooth. The end of the entering tooth is slightly chamfered, as shown at m, Fig. 4., so it will slide over the end of the spring and press the same against the side of the tooth m, the spring being inclosed between the two engaging teeth, so the tension of the spring will take up the lost motion between the teeth, and prevent any chattering noise which may arise from the rapid motion of the driving-shaft. Across the top of the bench is a beveled groove, a, parallel with the plane of the saw, and a similar groove placed transversely to the plane of the saw, which is not shown in the drawings. These grooves are in common use in saw-benches for the purpose of holding the guides or rests in ordinary use.

WVhat I claim as my invention, and desire to secure by Letters Patent, is

1. The combination, with a series of sawarbors carried concentrically about a central axis, and having clutches, substantially as described, of the driving-shaft having a sliding clutch adapted to engage the clutches upon the saw-arbors, as and for the purpose set forth.

2. The combination, with a series of sawarbors arranged concentrically about a central rotating axis, and having clutches, substantially as described, of a driving-shaft having a sliding clutch to engage the several clutches upon the saw-arbors, pivoted fork F,

| sliding bar (I, and springf, by which the sliding clutch on the drivingshaft is held against the engaging clutch upon the saw-arbor, as and for the purpose set forth.

3. The combination, with a series of sawarbors arranged concentrically about a central rotating axis, and having clutches, substantially as described, of a drivingshaft and sliding clutch thereon adapted to engage the several clutches on the saw-arbors,springs d, held between the sliding clutch and a fixed collar, f, on the driving-shaft, pivoted fork F, and connected sliding bar extending through the frame, whereby the sliding clutch may be disconnected from the clutch upon the sawarbor, as and for the purpose set forth.

4. The combination, with a series of sawarbors arranged concentrically about a r0- of connecting said driving-shaft with said sawarbors,of a locking-wheel, F, attached to said rotating axis, and having a series of holes, 6 e e", to receive the end of a sliding bar or pin in the frame, said holes being so arranged in the rim of the locking-wl1eel relatively with the positions of the several saw-arbors that looking the wheel F by any one of the holes e e 6 will hold the corresponding saw-arbor in axial line with the driving-shaft, as and for the purpose set forth.

5. The combination, with a series of sawarbors arranged concentrically about a rotating shaft, and a driving-shaft so placed that the successive saw-arbors may be brought into axial line therewith, with means for connecting the driving-shaft and the opposing sawarbor, of the locking-wheel F, having holes 6 e a. and teeth 2' z" tithe sector G, carrying pawls h and h, and sliding bar d, entering the holes in the wheel F, actuated by a spring suitably connected therewith, and having a wedgeshaped block, h as and for the purpose set forth.

6. The combination of a rotating shaft, 0, carrying a series of saw-arbors arranged concentrically about said shaft, and having an attached locking device, whereby the shaft 0 may be securely locked in position, shaft E, carrying driving mechanism which may be connected or disconnected with a saw-arbor brought into axial line therewith, and means connecting the driving mechanism on shaft E and the locking devices on shaft 0 so they will be operated conjointly, as and for the purpose set forth.

7. The combination, with the driving-shaft E and a series of saw-arbors, D, carried in a the saw-arbors may be brought in line with said driving-shaft, of a toothed clutch, D having springs m between the teeth, as described, and for the purpose set forth.

R. E. KIDDER.

Witnesses:

Bonus 13. FowLnR, Gno. E. SMITH.

tating axis, and a driving-shaft, with means revolving frame or spider, whereby each of 

